Contemporary Clinical Immunology and Serology 1st Edition by Kate Rittenhouse Olson,Ernesto DeNardin

Exercise 10

If a patient shows the signs and symptoms of severe rheumatoid arthritis but the 1:40 dilution of her sera did not show an agglutination reaction,
A) we should use an enzyme immunoassay instead, because we need a more sensitive assay
B) we should test for other forms of arthritis
C) we should serially dilute the serum and run the test again
D) we should report to the physician that she is negative for rheumatoid factor